I've had distorted sound when the I2S format was not exactly matching the expected one. In my case there was a difference in the justification of the format so I would start in that end instead
I have shortened the I2S-leads and the distortion remained. I played for a while and listened, it did sound more like sparks or discharger than distortion. Took a chance and connected the incoming GND to the incoming GND to the AIO438. And that solved the problem.
The Up2Stream are feed 5V by USB from a PC, the AIO438 are feed by a power supply. There was no ground connection between the PCBs untill now.
The Up2Stream are feed 5V by USB from a PC, the AIO438 are feed by a power supply. There was no ground connection between the PCBs untill now.
Them digital signals like their reference. VinHl (the lowest value to still get a logic high) and VinLh (the highest value to still get a logic low); values referred to GND.
My Zoudio 2.0 are ready!
2x Zoudio 438:
Signal feed by a Up2Stream Pro via I2S, parallel into the two Zoudio. BT disabled on the Zoudio, WiFi for streaming Spotify and USB for Netflix etc to the Up2Stream.
Start up volume on the two cards are to match the subs with the midds, I can turn up the midd by 3dB and the subs by 6dB for disco mode 🙂
2x Zoudio 438:
- one in 4 channel mode for midds and tweets
- one in 2 channel mode for sub
Signal feed by a Up2Stream Pro via I2S, parallel into the two Zoudio. BT disabled on the Zoudio, WiFi for streaming Spotify and USB for Netflix etc to the Up2Stream.
Start up volume on the two cards are to match the subs with the midds, I can turn up the midd by 3dB and the subs by 6dB for disco mode 🙂
Attachments
I was actually planning to develop two three-way loudspeakers. A module would be installed in each box for this purpose, each running in a 2.1 configuration.
With this plan in mind: can the delays then be used? I might need them for phase adjustment. What is meant by
Does this mean that the delay per channel feature is dead for good?
And what is most important: TWS would be urgently needed for this. The manual says:
"TWS TrueWirelessStereo. Will be enabled in a future firmware update"
I read through the whole thread hoping to find something positive about the implementation, but unfortunately I didn't find anything.
With this plan in mind: can the delays then be used? I might need them for phase adjustment. What is meant by
?
Does this mean that the delay per channel feature is dead for good?
And what is most important: TWS would be urgently needed for this. The manual says:
"TWS TrueWirelessStereo. Will be enabled in a future firmware update"
I read through the whole thread hoping to find something positive about the implementation, but unfortunately I didn't find anything.
Previous versions of the DSP configurations had the input mixer ganged together for A/B and C/D, which meant you could not create a typical 2.1 configuration (A=left, B= right, C/D= mono). I picked another DSP flow, which allows for separate input mixer settings. Unfortunately, due to the way TI designed the DSP, this means setting delay is not possible. I discovered this after implementing it into the configuration tool, hence why it is still visible there.
The BT module theoretically supports TWS, but Qualcomm had very limited support unless you were a major purchaser. Thus, I was not able to properly enable this future.
The BT module theoretically supports TWS, but Qualcomm had very limited support unless you were a major purchaser. Thus, I was not able to properly enable this future.
I can perhaps get round the first problem (phase) by reversing the polarity of the drivers and playing around with unequal filter slopes.
However, the second problem (TWS) is serious and would enormously restrict the possible uses of the module and make it unusable for my intended purpose.
Do you think that Qualcom might have mercy after all or that there might be an altruistic developer who can achieve something regarding TWS? Or do you think there is no chance that TWS will ever be implemented?
I ordered two modules yesterday (I still have to transfer the money) and am considering cancelling the order if there is no longer any hope of TWS being implemented.
However, the second problem (TWS) is serious and would enormously restrict the possible uses of the module and make it unusable for my intended purpose.
Do you think that Qualcom might have mercy after all or that there might be an altruistic developer who can achieve something regarding TWS? Or do you think there is no chance that TWS will ever be implemented?
I ordered two modules yesterday (I still have to transfer the money) and am considering cancelling the order if there is no longer any hope of TWS being implemented.
I have gotten some quotes from developers on 52bluetooth who claim to be able to enable it with the available leaked Qualcomm software on Chinese forums, but the risk and cost (10k+ USD) were too high for me to justify this.
You can still drive two speakers at the same time via the line-in, but I get that it's not the same. If no TWS is a dealbreaker for you, feel free to cancel your order by sending me a mail.
You can still drive two speakers at the same time via the line-in, but I get that it's not the same. If no TWS is a dealbreaker for you, feel free to cancel your order by sending me a mail.
I thought I read - on this forum - a comment about a BT module that can do TWS and outputs I2S. I remember clicking the link to Alibaba, er "express" and looking at the board. Cheap, like $6. I believe Zoudio amps can be configured to handle wired I2S inputs. That's how I run my 1st gen Zoudio amps; USB -> I2S -> Zoudio.
"Qualcomm QCC3008 Bluetooth V5.0 low power audio module APTXLL lossless compression TWS to box I2S"
https://www.aliexpress.us/item/3256807026891677.html
To run two amps I parallell do you need to have them in sync. I would not trust any kind of BT signal for that task.
I feed my two Zoudio with an Arylic up2stream pro via I2S. As they share the same source via wire will they be in synch as long as the internal DSP on the Zoudio do not create any delay in the signal path.
https://www.arylic.com/products/up2stream-pro-receiver-board
I am not sure if these run TWS out of the box properly.
The AIO438 has the QCC3031, which is the bigger brother of the QCC3008 you linked, which can also run TWS on paper.
However, to actually properly enable this feature, it requires digging around in the Qualcomm configuration tooling.
So even though the hardware supports it, I could not get it working.
The Qualcomm programming port is actually connected on the AIO438.
So if anyone actually wants to try their luck, they can reprogram it through the USB port.
You can dump the installed configuration first so it can be restored to factory settings.
Or ask me via mail and I will provide the firmware if needed.
Interesting board. @lutkeveld a few questions if I may. I am considering for use in a 3-way active, analogue input OK (optical is another option for me):
- is the amp always on or if not does is there signal sensing power on/off?
- can the 4 channels be configured for 3-way: one amp to tweeter, one to mid and two bridged to woofer? What would be the brdiged power to woofer into 4Ohm?
- I will need overall EQ, 4th order LR filters per channel and Linqwitz Transform (or asymmetric shelves) on woofer. Are all these possible?
- what are some suitable power supplies?
Public Announcement
It has been a great time offering this product since launching it in early 2022.
However, all good things come to an end.
Previous week I have mailed all existing customers about a clearance sale.
I was planning on extending this sale to this forum next, however all remaining stock sold out in a couple of days.
This amplifier was my introduction in the world of audio and electronics.
It was a nice experience to see so many people use it in various speaker builds all over the world.
If you are a B2B customer, I would like to refer you to my new venture ‘Zotec’ where I developed custom electronics for my clients. This includes audio equipment, but also more general controllers and IoT devices. You can visit the website and/or LinkedIn for more details:
www.linkedin.com/company/zotec-hardware/
www.zotec.nl
A direct successor of the amplifier for public sale is not planned. The TI TASxxxx remains a great chip series, so if anybody needs help embedding the newly released versions into their product, I would be glad to help.
Thanks for all the support and keep on building amazing speakers!
Kind regards,
Jesse van der Zouw
Owner Zoudio Electronics
It has been a great time offering this product since launching it in early 2022.
However, all good things come to an end.
Previous week I have mailed all existing customers about a clearance sale.
I was planning on extending this sale to this forum next, however all remaining stock sold out in a couple of days.
This amplifier was my introduction in the world of audio and electronics.
It was a nice experience to see so many people use it in various speaker builds all over the world.
If you are a B2B customer, I would like to refer you to my new venture ‘Zotec’ where I developed custom electronics for my clients. This includes audio equipment, but also more general controllers and IoT devices. You can visit the website and/or LinkedIn for more details:
www.linkedin.com/company/zotec-hardware/
www.zotec.nl
A direct successor of the amplifier for public sale is not planned. The TI TASxxxx remains a great chip series, so if anybody needs help embedding the newly released versions into their product, I would be glad to help.
Thanks for all the support and keep on building amazing speakers!
Kind regards,
Jesse van der Zouw
Owner Zoudio Electronics